Abstract: A hydraulic directional valve which has a valve housing and a filter element. At least one groove encircles the valve housing and the filter element is arranged in the groove and has at least one frame element and a filter fabric which is firmly connected to the frame element. The groove has a groove base and two side walls which extend substantially in the radial direction and circumferential direction.

Abstract: A filter element for a control valve of a camshaft adjuster. The filter element has an annular filter fabric for extracting particles, and a gripping frame for fastening the annular filter fabric. The gripping frame is designed here for the planar bracing of the annular filter fabric on the control valve. Furthermore, a control valve is disclosed for a camshaft adjuster with a corresponding filter element.

Abstract: An electromagnetic actuating unit for a hydraulic directional control valve and to a method for the assembly thereof. The actuating unit has a coil for generating a magnetic field, a yoke unit with a yoke and a yoke plate, and a pole core unit with a pole core and a housing for conducting a magnetic flux, and an armature unit which is arranged in the magnetic field of the coil and has an armature and a pressure pin as an actuator. The armature unit can be displaced in the direction of the longitudinal axis thereof in a first bearing point in the yoke unit and in a second bearing point in the pole core unit. At least one of the hearing points can be displaced in the radial direction during assembly of the actuating unit and can be fixed after a coaxial orientation of both bearing points.

Abstract: An activation element of an electromagnetic actuating unit of a hydraulic valve which has an armature that is essentially cylindrical and which is arranged in a slidable fashion in the actuating unit. Also, a method for manufacturing an activation element of an electromagnetic actuating unit of a hydraulic valve. The activation element has at least one substantially cylindrical armature, one plunger rod and one magnet cone. The plunger rod and the magnet cone are embodied in one piece with the armature.

Abstract: The invention relates to an electromagnetic actuation unit (2) of a hydraulic valve (1), with a housing (14), a closing body (4b) and a sealing element (6), the closing body (4b) being plugged into an insertion opening (14a) of the housing (14), the sealing element (6) bearing against the closing body (4b) and the housing (14) and protecting the interior of the actuation unit against the ingress of media.

Abstract: A hydraulic medium insert for a control valve in a hydraulic actuator which has a tubular guide sleeve for guiding a control piston, which is disposed in a receptacle, which has passage openings for the hydraulic medium, which are disposed in the guide sleeve and separated by webs. A plastic part is disposed on the exterior side of the guide sleeve and has sealing webs, which are supported on the inside on the webs of the guide sleeve, which separate the passage openings, and press against the inside of the receptacle to form a seal on the outside.

Abstract: The invention relates to an electromagnetic actuation unit (2) of a hydraulic valve (1), with a housing (14), a closing body (4b) and a sealing element (6), the closing body (4b) being plugged into an insertion opening (14a) of the housing (14), the sealing element (6) bearing against the closing body (4b) and the housing (14) and protecting the interior of the actuation unit against the ingress of media

Abstract: A hydraulic control valve (1) for controlling the flow of a pressure medium, having at least one drain port (T1, T2) communicating with a tank, at least one inflow port (P) communicating with a pressure medium source, and at least two supply ports (V1, V2, V3) communicating with at least one hydraulic consumer.

Abstract: A control valve (14) for a device (1) for modifying the control times of gas exchange valves (110, 111) of an internal combustion engine (100) is provided. A check valve is arranged inside an annular groove (44) which is formed on one of the components of the control valve (14) and through which a pressurized medium flows. This reduces the assembly costs.

Abstract: A control valve (14) for a device (1) for altering the valve timing for gas exchange valves (110, 111) of an internal combustion engine (100) is provided. A non-return valve (54) is located within an annular groove (44) formed on one of the components of the control valve (14) and pressurized medium flows through the annular groove. The assembly of the device is facilitated.